OBJECTIVE: Describe the four major types of fronts.

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OBJECTIVE Describe the four major types of
fronts.

• INTRO
• Write QA in notebook
• What does temperature have to do with weather?
• Do certain temperatures create certain types of
  weather?

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Air Masses and Fronts
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Air Masses and Fronts

• air mass
• 4 types of air masses

• A large body of air where temperature and
  moisture content are constant throughout.
• Changes in weather are caused by the movement and
  interaction of air masses.
• Maritime
• Continental
• Polar
• Tropical

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Air Masses and Fronts

• Maritime (m)
• Continental (c)
• Polar (P)
• Tropical (T)

• Forms over water
• Moist / wet
• Forms over land
• Dry
• Forms over polar regions
• Cold
• Develops over the tropics
• Warm

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Fronts

• Front
• 4 Types of Fronts

• The boundary between air masses
• Remember
• Cold air is dense
• Warm air less dense
• Cold
• Warm
• Occluded
• Stationary

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Air Masses and Fronts

• Cold Fronts

• Forms where cold air moves under warm air, which
  is less dense, and pushes the warm air up.
• Brings sever thunderstorms, heavy precipitation
• Followed by cool, clear weather

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Air Masses and Fronts

• Warm Fronts

• A warm front forms where warm air moves over
  cold, denser air.
• Brings drizzly rain
• Followed by clear, warm weather

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Air Masses and Fronts

• Occluded Front

• Forms when a warm air mass is caught between two
  colder air masses.
• Brings cool temperatures and large amounts of
  rain or snow.

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Air Masses and Fronts

• Stationary Front

• Forms when cold and warm air masses collide and
  cannot move past each other
• Brings many days of cloudy, rainy weather.

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